The document deals with the description of results obtained by the Relap code in the post-test open simulation of a LOCA experiment performed in the Boiling Water Reactor (BWR) experimental simulator ROSA-III installed at the Tokai-Mura Japan Atomic Energy Research Institute (JAERI, now JAEA) Research Center in Japan. The Relap is the well-known computer code developed at Idaho National Laboratory in US: the code is in use at UNIPI since more than a decade. The ROSA-III loop is an Integral Test Facility (ITF) simulating with reduced height, full pressure, modulated linear power a US (General Electric) type BWR. The concerned test was selected as International Standard Problem 12 (ISP 12) by OECD/NEA/CSNI. The document describes the results of the post-test calculation submitted (by UNIPI) to JAERI after the execution of the test. This is called open post-test analysis: the comparison of about 40 calculated time trends with measured data (once the experiment is performed: this is part of the ISP documentation issued as OECD report) allows an evaluation of the capabilities of the computer code and of the code user team in predicting the scenario of an accident. This is relevant for demonstrating the capabilities in evaluating safety margins of existing NPP, with main reference to BWR (present case).
"OECD CSNI ISP 12: analysis of a SBLOCA in the ROSA-III facility", University of Pisa Report, DCMN - RL 123(84), Pisa (I), Feb. 1984
D'Auria F.
Primo
Methodology
;
1984-01-01
Abstract
The document deals with the description of results obtained by the Relap code in the post-test open simulation of a LOCA experiment performed in the Boiling Water Reactor (BWR) experimental simulator ROSA-III installed at the Tokai-Mura Japan Atomic Energy Research Institute (JAERI, now JAEA) Research Center in Japan. The Relap is the well-known computer code developed at Idaho National Laboratory in US: the code is in use at UNIPI since more than a decade. The ROSA-III loop is an Integral Test Facility (ITF) simulating with reduced height, full pressure, modulated linear power a US (General Electric) type BWR. The concerned test was selected as International Standard Problem 12 (ISP 12) by OECD/NEA/CSNI. The document describes the results of the post-test calculation submitted (by UNIPI) to JAERI after the execution of the test. This is called open post-test analysis: the comparison of about 40 calculated time trends with measured data (once the experiment is performed: this is part of the ISP documentation issued as OECD report) allows an evaluation of the capabilities of the computer code and of the code user team in predicting the scenario of an accident. This is relevant for demonstrating the capabilities in evaluating safety margins of existing NPP, with main reference to BWR (present case).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
